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Structured Ultra-Flyweight Aerogels by Interfacial Complexation: Self-Assembly Enabling Multiscale Designs.

Milad Kamkar¹, Ahmadreza Ghaffarkhah², Rubina Ajdary^1,3

¹Department of Chemical and Biological Engineering, Department of Chemistry and Department of Wood Science, Bioproducts Institute, University of British Columbia, 2360 East Mall, Vancouver, BC, V6T 1Z3, Canada.

Small (Weinheim an Der Bergstrasse, Germany)

|March 13, 2022

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Researchers developed a new soft material using liquid streaming (LS) and graphene oxide (GO) nanosheets. This method creates versatile, ultralight aerogels with tunable electrical properties for applications like conductive circuits.

Area of Science:

Materials Science
Nanotechnology
Fluid Dynamics

Background:

Graphene oxide (GO) nanosheets and surfactants can self-assemble at interfaces.
Microfluidic techniques offer precise control over material fabrication.

Purpose of the Study:

To develop a novel method for creating advanced soft materials with controlled hierarchical structures.
To engineer multifunctional materials with tunable mechanical and electrical properties.

Main Methods:

Utilized a microfluidic approach termed "liquid streaming" (LS) for interfacial complexation.
Controlled material morphology and hierarchy by adjusting oil phase, injection pressure, speed, and nozzle diameter.
Converted LS systems into ultra-flyweight aerogels with multiscale porosities.

Keywords:

graphene oxide interfacial assembly liquid streaming ultra-flyweight aerogels

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Main Results:

Achieved continuous, multilayer, interpenetrated, and tubular soft material structures.
Fabricated ultralight, worm-like aerogels with micro- and macro-scaled porosities.
Demonstrated outstanding mechanical compressibility and tailorable electrical activity due to reduced GO nanosheets.

Conclusions:

Liquid streaming (LS) is a versatile platform for engineering soft materials and solid constructs.
The developed materials exhibit potential for advanced functionalities, including ultralight conductive circuits and electromagnetic interference shields.
This approach opens new avenues for tunable material design with hierarchical order and morphology.